I bet the regular leafs from Hoosier Rose are crosses with your regular leafs Reed. Those crosses might be fairly valuable to you as it’s possible that your survivors may survive for different reasons. I sometimes plant whole community flats of my potato leaf seed just for a few hybrids.
I suspect that as a group potato leafs suffer from low genetic diversity and high degrees of relatedness. Every potato leaf x regular leaf cross we make though works to fix that. I’ve now got plants that are potato leaf from three crosses in my garden so by pedigree only a small percentage the original potato leaf I started with.